At approximately 2:28 p.m. Monday, NASA will send its twin spacecrafts Ebb and Flow hurtling into the moon at 3,760 mph -- and the space agency will have a live play-by-play of the event, hosted by scientists in the control room at the Jet Propulsion Laboratory in La Cañada Flintridge.

The live feed begins at 2 and ends around 2:30. Unfortunately, you will not be able to see the two crashes because the lunar crater that will be their final resting places will be in shadow at the time.

NASA scientists admit to feeling sad about the deliberate destruction of these two spacecraft. They were launched from Earth in September of 2011 to help scientists learn more about the lunar gravity field. Ebb and Flow completed their primary three-month mission, then went on to complete an extended mission as well.

But now they are in low orbit and running out of fuel. Since they can no longer make scientific measurements, it is time to say goodbye.